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Sustainability 2019, 11(3), 633; https://doi.org/10.3390/su11030633

On the Possibility of Using Recycled Mixed Aggregates and GICC Thermal Plant Wastes in Non-Structural Concrete Elements

1
Department of Construction Materials, Centro Tecnológico de la Construcción, Pol. Oeste, 30820 Alcantarilla, Spain
2
Departamento de Ingeniería Civil, University of Alicante, 03080 Alicante, Spain
3
Department of Architecture and Building Technologies, Technical/Polytechnic University of Cartagena, Paseo Alfonso XIII, 30203 Cartagena, Spain
4
ENCOMAT Group, University of Vigo, 36310 Vigo, Spain
*
Author to whom correspondence should be addressed.
Received: 24 October 2018 / Revised: 18 November 2018 / Accepted: 21 November 2018 / Published: 25 January 2019
(This article belongs to the Section Sustainable Engineering and Science)
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Abstract

Industrial wastes are often used as aggregate in concrete production to promote a more sustainable construction and to reduce production costs. This article presents the results of an experimental campaign on the influence of replacing natural aggregate with several construction and demolition wastes (C&DW) as recycled aggregate, as well as the use of fly ash and slag, wastes produced in Gas Incinerator Combined Cycle (GICC) thermal power plants, in the mix design of non-structural concrete. Different percentages of natural aggregates were substituted with recycled aggregates either coming from construction and demolition wastes, or from the coarse fraction of the slags from thermic plants in the manufacture of concrete. The mechanical properties, capillary water absorption, density, carbonation, chloride ingress and sulphate resistance have been tested. The results show a decrease in properties when C&DW are used. Fine fraction of slag and fly ash has an important advantage, and can even improve the long term properties of concrete prepared with natural aggregates. Coarse fraction of slag as a recycled aggregate generally improves most of the properties of manufactured concretes. View Full-Text
Keywords: compressive strength; durability; recycled aggregates; construction and demolition wastes; wastes from combined cycle thermal plant compressive strength; durability; recycled aggregates; construction and demolition wastes; wastes from combined cycle thermal plant
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Rodríguez, C.; Sánchez, I.; Miñano, I.; Benito, F.; Cabeza, M.; Parra, C. On the Possibility of Using Recycled Mixed Aggregates and GICC Thermal Plant Wastes in Non-Structural Concrete Elements. Sustainability 2019, 11, 633.

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